What have private schools done for (some of) us?

Many parents in Britain make huge financial sacrifices to send their children to private schools. Are those sacrifices worthwhile? What return, if any, do they get? Do their children end up in better careers, earning more, than if they have been educated at the expense of the state? Francis Green, Stephen Machin, Richard Murphy and Yu Zhu examine who exactly benefits from the privileges of the Old School Tie.